Trust me, no one wants to feel as miserable as this, especially not during what should be one of the most joyous times of life. I am a survivor and my children are too, and while HG is robbing me of life right now, I know in the end we will come out strong.

Like every mama with HG, she'll blame herself for this. No matter how much she wants this baby, she'll feel guilty. George's life will change, and Kate will miss precious time with him. And that's perhaps worse than the sickness: being stuck in bed when your child needs you.

I don't know how to narrate the experience of trying to decide if I should save the life of the mother of my existing children or hope to live through my body shutting down to try to keep growing their little sister.

It was the most painful decision we ever had to make. I could continue to risk my health and my family's well-being to continue a pregnancy that we knew wouldn't make it, or we could end the pregnancy.

I wish Kate Middleton improved symptoms and an easier, safe pregnancy for her and her family. I also hope that someday all expecting women will experience the skilled care and concern that a duchess deserves.

If the announcement of the royal baby has ignited this much of a frenzy, one can only imagine what the birth itself will be like. We may not yet know the due date, but whenever their first child arrives, the event will make royal history.

Twins for Kate? The princess's hyperemesis gravidarum has led to speculation that she is having twins. With this speculation about twins comes the misconceptions about twin zygosity and twin inheritance that have persisted, even among skilled medical professionals.

Even now, 20 years after the birth of my last child, I am strangely exhilarated by the validation of a medical condition that I suffered with through the pregnancies of all my children. I suspect more people than I knew thought I was exaggerating, that morning sickness is routine and I was complaining about an all-too-common condition.